Filthy deplorable condition of a VW, Samavest should be taken off your partners list!

Hi there my recent rental reference number refers (45001997). The car was in the most deplorable conditions. I've used your services all over the world this year, namely USA, Australia and Iceland. The car was filthy (not washed or cleaned) upon collection, brakes barely worked, was making a helluva noise, and the icing on the cake was when the cockroaches came out to play when dusk dawned upon the island of Langkawi. Although I appreciated their company, the uninvited guests in my rented car were most unwelcome. Is there a way you can streamline your partners or ensure they provide cars that are decent in condition?!